Antec Solution SLK3000B ATX Super Mid-Tower without Power Supply (Black) No power supply, drive rails for 5.25" drives 2 front USB 2.0 ports with shielded cables 11 drive bays with four external 5.25", two external 3.5", and five internal 3.5" drives Rubber grommets to absorb hard drive vibration Fits Micro ATX (9.6-by-9.6-inch) and Standard ATX (12-by-9.6-inch) motherboards